Which option correctly states the corrosion protection requirement for severely corrosive atmospheres?

• A. No special materials required.
• B. Special corrosion-resistant materials or coatings shall be used in severely corrosive atmospheres.
• C. Paint alone is sufficient.
• D. Corrosion protection is not necessary.

Answer: (B)

In severely corrosive atmospheres, the design requirement is to use special corrosion-resistant materials or protective coatings to keep the system’s integrity over time. This means selecting materials that are inherently resistant to the specific chemicals or environmental factors present, or applying durable coatings that can withstand the exposure without failure. The goal is to prevent deterioration of critical components such as cabinets, piping, fasteners, and seals so the system remains functional when needed.

Paint alone is not considered sufficient protection in these environments because it can degrade, crack, or wear away under harsh chemical exposure, leaving the underlying material vulnerable. Saying no special materials or coatings are needed ignores the risk of rapid corrosion and potential system failure. Similarly, claiming corrosion protection isn’t necessary contradicts the purpose of ensuring reliable performance in challenging environments.

So the mandatory approach is to employ corrosion-resistant materials or coatings appropriate to the specific severely corrosive conditions.